Document 5bLr9jOYE0G3dOwyXXKQbRQxN

386 CHAPTER 16 1953 Guide are considered consistent with good practice, although there are boilers which have high efficiencies and also operate at higher transmission rates. TESTING AND RATING CODES The Society has adopted four solid fuel testing codes, a solid fuel rating code, and an oil fuel testing code. . ASHVE Standard and Short Form Heat Balance Codes for Testing Low-Pressure Steam Heating Solid Fuel Boilers--Codes 1 and 2--(Re vision of June, 1929),1 provide a method for conducting and reporting tests to determine heat efficiency and performance characteristics. ASHVE Performance Test Code for Steam Heating Solid Fuel. Boilers --Code No. 3--(Edition of 1929)1 is intended for use with ASHVE Code for Rating Steam Heating Solid Fuel Hand-Fired Boilers.2 The object of this test code is to specify the tests to be conducted, and to provide a 1 method for conducting and reporting tests to determine the efficiencies and performance of the boiler. The ASHVE Standard Code for Testing Steam Heating Boilers Burning Oil Fuel,5 (Adopted June, 1932), provides a standard method for con ducting and reporting tests to determine the heating efficiency and per formance characteristics when oil fuel is used with steam heating boilers. The ASHVE Standard Code for Testing Stoker-Fired Steam Heating Boilers,4 (Adopted June, 1938), provides a test method for determining the efficiency and performance characteristics of any stoker and boilercombination burning any type of solid fuel, such as anthracite or bi tuminous coal. The Steel Boiler Institute, Inc. has adopted a Rating Code for Com mercial Steel Boilers and Residential Steel Boilers, and for Testing OilFired Residential Steel Boilers (Fifth Edition as Revised Jan. 1, 1948). The commercial boilers (defined as those having 129 to 2500 sq ft of heating surface) are rated in square feet (steam) on the basis'of heating surface with limitations set for grate area, furnace volume, and furnace height. Table 1. SBI Net Rating Data fob Residential Steel Boilers--Oil Fired" Sq Ft Steam 275 320 400 550 700 9QD 1100 1300 1500 1800 2200 2600 3000 SBI Net Rating Sq Ft Water 440 510 640 880 1120 1440 1760 2080 2400 2880 3520 4160 4800 Btu 66000 77000 96000 132000 168000 216000 264000 312000 360000 432000 528000 624000 720000 Minimum Furnace Volume Cu Ft 2.5 2.9 3.6 5.0 6.4 8.2 10.0 11.8 13.6 16.4 20.0 23.6 27.3 Heating Surface Sq Ft 16 19 24 32 41 53 65 77 88 106 129 153 177 Stoker-fired and Gas-fired SBI Net Rating not greater than Oil-fired. Hand-fired, SBI Net Rating (Steam) not greater than 14 times the square feet of Heating surface. 2,190 2.680 3,160 3,650 4,250 4,860 5,470 8,750 6,080 9,720 7,290 11,660 4.800.000 16,670 6.000. 00020,830 7.200.000 25,000 8.400.000 29,170 12.500 20,000 3.000. 01000,420 16,700 2.500.000 15.000 24.000 3.600.000 12.500 20,000 3.000. 000 17.500 28.000 4.200.000 14,580 23.330 3.500.000 Hekting Boilers, Furnaces, Space Heaters Jik' a sg fOfOfO fOtot^ fO *+> ^ ** ^ ^ -t* O'O'O C'OO 'O'OO \OOM 00 OQ QO OOOOOO.OO Steam Outlet I.P.8. In. OO O' O 0 OO OQ O 387 4.000. 000 5.000. 000 6.000. 000 7,000,000 mum Grate Area Sq Ft M in i 9.330 1.400.000 11.330 1.700.000 13.330 2,000,000 6.000 900,000 6.670 1,000,000 8,000 1,200,000 600.000 700.000 800.000 360.000 439.000 521.000 Btu 26.670 33.330 40,000 46.670 4.000 4.670 5.330 2,400 2,930 3,470 8q Ft Water 5.830 7,080 8.330 3,750 4.170 5,000 2.500 2,920 3.330 1.500 1.830 2.170 i 5 J I e 11,200 1.680.000 13.600 2.040.000 16,000 2.400.000 7,200 1,080,000 8,000 1,200,000 9.600 1.440.000 720.000 840.000 960.000 432.000 528.000 624.000 Btu 32.000 .40,000 48.000 56.000 4,800 5.600 6,400 2,880 3,520 4,160 Sq F t Water SBI Rating 20.000 25.000 30.000 35.000 7,000 8.500 10,000 4.500 5.000 6.000 3.000 3.500 4.000 1,800 2,200 2,600 T a b l e 2. S B I R a tin g s for Co m m e r c ia l St e e l B o ile r s . 4.800.000 6.000. 000 7.200.000 8.400.000 | Heating Surface Sq F t Si illii CbtS `uO(--N'OICOO--'OOi i--no1(os00'nO6 M(cNoOl/w5O('N&d' m cOoi>m--. tOotjoet~rs-iVcn) MCOvQR ri \cocrsoeSOsv ^O' is ti--os> o--toscto** NNO 00 Hift H to O' pn4 neo^rot-o^ Oto' t^o 3SS to to to * to 'O :a^soa1^0sQ>Ro'e OO OO CO ICNOO lOO'fO'O xt--oooo COro*--o< *to-.o-fO M in i mum Furnace Volume Cu F t* 7,200 1,080,000 8,000 1,200,000 9.600 1.440.000 720.000 840.000 960.000 432.000 528.000 624.000 Btu 4,800 5.600 6,400 2,880 3,520 4,160 s9 a s 3 & *0C3Q* 3 s X 1 4.500 5.000 6.000 3.000 3.500 4.000 1,800 2,200 2,600 Sq Ft Steam 32.000 40.000 48.000 56.000 20.000 25.000 30.000 35.000 3.643.000 12.500 20,000 3.000. 000 4.373.000 15.000 24.000 3.600.000 5.100.000 17.500 28.000 4.200.000 2.040.000 7,000 11,200 1.680.000 2.479.000 8.500 13.600 2.040.000 2.916.000 10,000 16.000 2.400.000 5.830.000 7.286.000 8.743.000 10,200,000 1.313.000 1.459.000 1.750.000 876.000 1,020,000 1,166,000 526.000 643.000 758.000 Btu 38,860 48,570 58.280 68.000 5,840 6,800 7,770 3,500 4,280 5,050 Sq F t Water SBI Rating ll 8,500 13,600 10,330 16,520 12,150 19,440 15,180 24.280 18,220 29,150 21,250 34.000 24,290 30,360 36,430 42,500 * Oil, gaa or bituminous stoker-fired ooal. Minimum furnace volumes for anthracite, stoker-fired, are not specified in this code. b Bituminous, stoker-fired. 0The tapping sites shown for boilers having 129 to 600 sq f t of heating surface, inclusive are adequate for forced hot water.